diff -r 000000000000 -r 6474c204b198 widget/cocoa/nsIdleServiceX.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/widget/cocoa/nsIdleServiceX.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,33 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef nsIdleServiceX_h_
+#define nsIdleServiceX_h_
+
+#include "nsIdleService.h"
+
+class nsIdleServiceX : public nsIdleService
+{
+public:
+  NS_DECL_ISUPPORTS_INHERITED
+
+  bool PollIdleTime(uint32_t* aIdleTime);
+
+  static already_AddRefed<nsIdleServiceX> GetInstance() 
+  {
+    nsRefPtr<nsIdleService> idleService = nsIdleService::GetInstance();
+    if (!idleService) {
+      idleService = new nsIdleServiceX();
+    }
+    
+    return idleService.forget().downcast<nsIdleServiceX>();
+  }
+  
+protected:
+    nsIdleServiceX() { }
+    virtual ~nsIdleServiceX() { }
+    bool UsePollMode();
+};
+
+#endif // nsIdleServiceX_h_